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  1. Siberian Ribbons - USGS Earth as Art
  2. George Washington, by Gilbert Stuart, 1821
  3. Civil War print of Union cavalry soldiers charging a Confederate firing line
  4. History Of Power
  5. Mercury
  6. Minnesota - USGS State Mosaic
  7. Andalgalornis steulleti, a flightless predatory bird
  8. Earth
  9. Richat Structure - USGS Earth as Art
  10. Idaho - USGS State Mosaic
  11. Andes - USGS Earth as Art
  12. A simplified Herzprung Russell Diagram showing how stars are classified
  13. Drafting the Declaration of Independence, 28th June 1776, detail of Thomas Jefferson
  14. Heather - Botanical Illustration
  15. Pencils
  16. Vintage American History print of General George Washington at The Battle of Trenton
  17. Knight's armor
  18. A pair of Allosaurus dinosaurs explore the remains of a Diplodocus carcass
  19. Conceptual image of DNA
  20. Capture and Death of Sitting Bull Lithograph
  21. Mushroom Chart II
  22. The Outward Bound, 1912
  23. Vintage Civil War print featuring the Battle of Gettysburg
  24. Paris at Thermopylae
  25. Ferdinand Magellan (1480-1521) on discovering the Pacific Ocean
  26. Blood cells in blood vessel, artwork
  27. George And Martha Washington At Presidential Reception
  28. Strength In Numbers
  29. Brain antomy, 19th century artwork
  30. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  31. Normal spine, X-ray
  32. Travels Around the World
  33. Women's Rights Parade, 1917
  34. Sierra de Velasco - USGS Earth as Art
  35. The Presidents Educational Poster, 2017
  36. Antique Stock Certificate I
  37. The Birth of Rostam by Caesarean. Shahnameh. The Book of Kings. 16th c. Persian Art
  38. Alternating Motor - Blue
  39. Wisconsin - USGS State Mosaic
  40. If I Were A Cloud
  41. Orbits of Earth Crossing Asteroids
  42. Pneumonia Strikes like a Man Eating Shark - WPA Poster
  43. RMS Titanic during fitting out, 01 January 1912
  44. Knights charging into battle
  45. Mark Twain , 1901
  46. Full on view of a Woolly Mammoth
  47. 'Nurse's Song,' plate 18 from 'Songs of Innocence,' 1789
  48. San Francisco Chronicle announcing the end of World War I, 1918